JP2001051204A - microscope - Google Patents

Abstract

(57) [Summary] To reduce the height of a space that must be secured as a moving space for a light guide fiber bundle above the upper surface of a housing of a microscope. An insertion opening into which a fiber guide of a light guide fiber for supplying illumination light to an illumination optical system fixed in the housing of the binocular microscope is inserted. 1a is opened. The periphery of the insertion opening 1a is formed as a concave portion 101a lower than other portions of the housing upper plate 1. Further, the outer edge of the insertion slot 1a is provided with the knob 12 of the fiber guide 122.
A fiber guide insertion portion 123 for holding 2a is attached. This fiber guide insertion portion 123 has a knob 1
In a state where the fiber guide 12a is held,
The outer end of 2 exists in the same plane as the housing upper plate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microscope for magnifying and forming an image of an object to be observed, and more particularly to a microscope which applies illumination light introduced from an external light source through a light guide fiber bundle to the object through an illumination lens. It relates to a microscope for irradiation.

[0002]

2. Description of the Related Art Microscopes of this kind are used, for example, in treating fine tissues such as neurosurgery. That is, since organs composed of fine tissues such as the brain are difficult to visually discriminate the structural tissues, such organs must be treated under a microscope.

[0003] In such a microscope, an image becomes dark because the objective optical system has a high magnification, so that an illumination optical system for illuminating an observation object is indispensable. In order to introduce illumination light into such an illumination optical system, for example, a light source device used in an endoscope system is diverted, and a base end of a light guide fiber bundle is connected to an illumination light base of the light source device. The tip may be inserted into the upper surface of the microscope (that is, the surface opposite to the object side), and the illumination light from the light source device may be introduced into the illumination optical system through the light guide fiber bundle.

FIG. 13 is a schematic configuration diagram of a microscope (video microscope) having such an illumination optical system. As shown in FIG. 13, in a microscope 400, an objective optical system 402 and an illumination optical system 403 for forming an image of an observation object on an imaging surface of an imaging element 401 have their optical axes parallel to each other. It is arranged to. An insertion opening 400b into which the tip of the light guide fiber bundle 404 is inserted is formed on an extension of the illumination optical axis Ax5 on the housing upper surface (upper surface in FIG. 13) 400a of the microscope 400. The light guide fiber bundle 40
The base end of 4 is connected to a light source device (not shown), and illumination light emitted from the light source device is guided through the light guide fiber bundle 404 and emitted from the distal end. This light guide fiber bundle 404
Is covered with a hollow pipe-shaped fiber guide 405 in order to guide the tip to a predetermined position with respect to the first surface of the illumination optical system 403. On the other hand, a fiber guide insertion portion 406 as a base for fixing the fiber guide 405 is attached to the above-described insertion port 400b.

[0005]

When such a configuration is employed, the light guide fiber bundle is located above the base end of the fiber guide 405 (the end of the portion protruding from the fiber guide insertion portion 406). 40
4 is curved. Accordingly, if the minimum curvature radius of the light guide fiber bundle 404 is α, the distance from the upper surface of the housing upper plate 400a to the tip of the fiber guide 405 is a, and the outer diameter of the light guide fiber bundle is d, A space at least a distance α + a + d above the upper surface of the body plate 400a must be secured as a movement space for the light guide fiber bundle 404. In other words, if options and other devices enter this moving space, the light guide fiber bundle 404 cannot move freely, which makes the handling of the microscope 4 itself worse.
No options or other devices can enter into this moving space.

In view of the above problems, the present invention can reduce the height of a space which must be secured as a moving space for the light guide fiber bundle above the upper surface of the housing of the microscope. The challenge is to provide a microscope with improved performance.

[0007]

In order to achieve the above object, the present invention provides an objective optical system for shaping an image of an observation object, and an illumination optical system for irradiating the observation object with illumination light. A microscope comprising a system and a housing containing the objective optical system and the illumination optical system, wherein the housing has an insertion opening through which a light guide for supplying illumination light to the illumination optical system is inserted. It is characterized in that it is opened coaxially with the optical axis of the illumination optical system, and that the outer surface of the housing around the insertion opening is formed as a concave portion that is more concave than other portions.

With such a configuration, the starting point of the bending of the light guide is lower by the depth of the concave portion than when no concave portion is formed on the outer surface of the housing of the binoculars. Therefore, the space that must be secured as a moving space for the light guide is reduced by the depth of the concave portion, compared to the case where the concave portion is not formed on the outer surface of the housing of the binoculars. Will be better.

The light guide may be formed of a single flexible resin fiber, or may be formed of a light guide fiber bundle made of resin or glass. In the former case, it is relatively stiff, so it can be used without any reinforcement. However, in the latter case, it is soft, so a reinforcing means for straightening its tip is required. As the reinforcing means, for example, a hard pipe can be used. When the reinforcing means is employed as described above, a fixing member for positioning and fixing the reinforcing means is attached to the insertion opening. This fixing member
The reinforcing means is fixed with its base end slightly protruding from the insertion opening, but since the outer surface of the housing around the insertion opening is more concave than the other parts, compared to a configuration in which the outer surface of the housing is not concave Thus, the starting point of the bending of the light guide is lowered by the depth of the concave portion. In particular, if the reinforcing means is fixed by the fixing means so that the base end of the reinforcing means does not protrude from the opening of the recess, the moving space of the light guide is reduced as much as possible while the fixing means can be fixed by the fixing means.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

In the embodiments described below, the microscope of the present invention video-photographs an object to be observed as a stereoscopic image by an objective optical system in which a pair of right and left zoom lenses is combined with a commonly used close-up lens group. It is implemented as a video stereo microscope. Such a video stereo microscope (hereinafter simply referred to as “stereo microscope”)
Is used, for example, by being incorporated into an operation support system used in neurosurgery. This surgery support system combines a stereoscopic image (stereo image) obtained by video-taking a patient's tissue with a stereoscopic microscope with a CG (computer graphic) image created based on data of an affected part obtained in advance. Display on a stereoscopic viewer dedicated to the main engineer or a monitor for other staff, etc.
This is a system for recording on a recording device. (Overall Configuration of Surgery Support System) FIG. 1 is a system configuration diagram showing an outline of the surgery support system. This figure 1
As shown in FIG.
01, a high-vision CCD camera 102 attached near the upper end of the back of the stereoscopic microscope 101, and a microscope position measuring device 103 also attached near the lower end.
A counter weight 104 attached to the upper surface of the stereo microscope 101; a light guide fiber 105 that penetrates through the through hole formed in the counter weight 104 and is conducted to the inside of the stereo microscope 101; A light source device 106 for introducing illumination light to the stereo microscope 101 through the optical system, a surgical planning computer 108 having a disk device 107, a real-time CG creating device 109 connected to the microscope position measuring device 103 and the surgical planning computer 108, An image synthesizing device 110 connected to the real-time CG creating device 109 and the high-vision CCD camera 102, a distributor 111 connected to the image synthesizing device 110, a recording device 115, a monitor 114, and a stereoscopic device connected to the distributor 111. Visual viewer 13, etc., are constructed.

The above-mentioned disk device 107 has a patient P
Images (CT scan images, MRI images, SPEC) obtained by previously imaging the affected area with various imaging devices
T images, angiographic images, etc.) and three-dimensional data of the diseased part and peripheral tissues created in advance based on these various images are stored. Note that the three-dimensional data is based on three-dimensional local coordinates defined using a reference point (marking or the like) set at a specific portion of the patient's outer skin or internal tissue as the origin, shape and size of the affected part and surrounding tissue. The data specifies the position in a vector format or a map format.

The above-mentioned stereo microscope 101 is provided with a first stand 10 via a mount attached to the back surface thereof.
The free arm 100a is detachably fixed to the tip of the free arm 100a. Therefore, the stereoscopic microscope 101 is movable within a radius that the tip of the free arm 100a of the first stand 100 can reach, and can be oriented in any direction. However, here, for convenience, the direction of the subject with respect to the stereoscopic microscope 101 is defined as “down”, and the opposite direction is defined as “up”.

The optical configuration inside the stereo microscope 101 will be described in detail later.
As illustrated in FIG. 2, the observation target includes a large-diameter close-up optical system 210 having a single optical axis, and a pair of left and right that converge light transmitted through different portions of the close-up optical system 210. Zoom optical system 220, 2
An objective optical system consisting of 30
The images are formed as primary images at positions 0 and 271, respectively.
These left and right primary images are formed by a pair of left and right relay optical systems 24.
0, 250, which is introduced into the high-vision CCD camera 102 and has an imaging surface of a high-vision size (vertical and horizontal aspect ratio = 9: 16).
6 (the vertical and horizontal aspect ratio =
9: 8), they are re-imaged as secondary images.

With such a photographing optical system, the CCD 11
The images formed in the left and right imaging regions on the imaging surface of No. 6 are equivalent to stereo images in which images respectively taken from two places separated by a predetermined base line length are arranged on the left and right. The output signal of the CCD 116 is generated as a Hi-Vision signal by the image processor 117 and output from the Hi-Vision CCD camera 102 to the image synthesizing device 110.

The stereoscopic microscope 101 has a built-in illumination optical system 300 (see FIG. 6) for illuminating the observation object existing near the focal point of the close-up optical system 210. Then, illumination light is introduced into the illumination optical system 300 from the light source device 106 via the light guide fiber bundle 105.

Returning to FIG. 1, the microscope position measuring device 103 attached to the stereoscopic microscope 101 is used to determine the distance to the observation object on the optical axis of the close-up optical system 210.
The three-dimensional direction of the optical axis of the close-up optical system 210 and the position of the reference point are measured, and the position of the observation target in the local coordinates is calculated based on the measured information. Then, the information on the direction of the optical axis and the position of the observation target is notified to the real-time CG creation device 109.

This real-time CG creation device 109
Based on the information of the direction of the optical axis and the position of the observation object notified from the microscope position measuring device 103, and the three-dimensional data downloaded from the surgical planning computer 108, the affected part (for example, a tumor) is determined from the direction of the optical axis. CG image equivalent to stereoscopic viewing (eg, wireframe image)
Generate in real time. This CG image is generated as a stereoscopic image (stereo image) at the same base length and the same subject distance as the optical system in the stereoscopic microscope 101. Then, the real-time CG creation device 109 inputs a CG image signal indicating the CG image generated in this way to the image synthesis device 110 as needed.

The image synthesizing apparatus 110 converts a high-vision signal of an actual observation object input from the high-vision CCD camera 102 into a real-time CG generating apparatus 109.
Is superimposed by adjusting the scale of the CG image signal obtained from. In the image indicated by the high-definition signal in which the CG image signal is superimposed, the shape of the affected part,
The size and position are shown as a CG image such as a wire frame. The superimposed Hi-Vision signal is transmitted by the distributor 111 to the stereoscopic viewer 113 for the operator D, the monitor 114 for other surgical staff or an advisor at a remote location, and the recording device 115. Supplied respectively.

The stereoscopic viewer 113 includes the second stand 1
Twelve free arms 112a are attached by hanging from the tips. Therefore, it is possible to arrange the stereoscopic viewer 113 according to a posture in which the main operator D can easily perform the treatment. FIG. 3 shows a schematic configuration of the stereoscopic viewer 113. As shown in FIG. 3, the stereoscopic viewer 113 includes a high-definition LCD panel 12.
0 is built in as a monitor. This LCD panel 1
When an image based on the high-definition signal from the distributor is displayed on the LCD 20, an image captured in the left imaging area of the CCD 116 is provided on the left half 120b of the LCD panel 120, as shown in the plan view of FIG. The right half 120a displays an image photographed in the right photographing area of the CCD 116. The boundary 120c between these left and right images is shifted or tilted depending on the position adjustment of the field stops 270 and 271 described later. The optical path in the stereoscopic viewer 113 is divided into right and left by a partition wall 121 installed perpendicularly to the boundary line 120c when the field stops 270 and 271 are accurately adjusted. On both sides of the partition 121, the LCD panel 1
Wedge prism 119 and eyepiece 1 in order from the 20 side
18 are arranged. This eyepiece 118 is an LC
This lens forms a virtual image of an image displayed on the D panel 120 by enlarging it at a position about 1 m (-1 diopter) in front of the observation eye I. The wedge prism 119 corrects the traveling direction of light so that the angle of convergence of the observation eye I is equal to the angle at which an object existing 1 m ahead is observed, thereby enabling natural stereoscopic observation.

In an image stereoscopically viewed by the stereoscopic viewer 113 or an image displayed on the monitor 114, as described above, detection has been performed based on images previously photographed by various photographing devices. A CG such as a wire frame indicating the shape, size and position of an affected part such as a tumor is superimposed. Therefore, the main operator D or other surgical staff observing these,
An affected part that is difficult to identify in an actual video can be easily identified. As a result, accurate and prompt treatment can be performed. (Configuration of stereo microscope) Next, the stereo microscope 101 described above is used.
The specific configuration of the camera (including the high-vision CCD camera 102) will be described in detail. As shown in the perspective view of FIG.
02 has a substantially prismatic shape with a flat rear surface and chamfered edges on both sides of the front surface (opposite side surface of the rear surface).

The stereoscopic microscope 101 includes a photographing optical system 200 for electronically photographing an image of an object, and an illumination optical system 300 for illuminating the object with illumination light guided from a light source device 106 by a light guide fiber bundle 105. It is composed of <Optical Configuration of Photographic Optical System> Next, the optical configuration of the stereoscopic microscope 101 will be described with reference to FIGS. FIG. 6 is a perspective view showing the entire configuration of the microscope optical system, FIG. 7 is a side view,
FIG. 8 is a front view, and FIG. 9 is a plan view.

Photographic optical system (a pair of left and right phototaking optical systems) 20
0 is an objective optical system including one close-up optical system 210 shared by the left and right, and a pair of left and right zoom optical systems 220 and 230 as described above;
A pair of left and right relay optical systems 240 and 250 for relaying a primary image of a subject formed by the objective optical system to form a secondary image of the subject, and these relay optical systems 240 and 2
And a converging prism 260 as an inter-optical axis distance reducing element for bringing the subject light from the lens 50 closer to each other.

Field stops 270 and 271 are arranged at positions where the primary images are formed by the zoom optical systems 220 and 230, respectively. Are disposed, respectively.

With such a configuration, the CCD camera 10
The left and right subject images having a predetermined parallax can be formed in two adjacent regions on the CCD 116 arranged in the second CCD 2. In the description of the optical system, “left and right” is C
When projected onto the CD 116, the direction coincides with the longitudinal direction of the imaging surface, and “up / down” refers to the direction orthogonal to the left / right direction on the CCD 116. Hereinafter, the configuration of each optical system will be described in order.

As shown in FIGS. 6, 7, and 8, the close-up optical system 210 includes a negative first lens 211 and a positive second lens 212 arranged in order from the object side. The second lens 212 is movable in the optical axis direction,
The focus can be adjusted for objects at different distances by the movement adjustment.

That is, the close-up optical system 210
Has a collimating function that is adjusted so that the subject is located at the focal position, and converts divergent light from the subject into substantially parallel light.

First and second close-up optical systems 210
Each of the lenses 211 and 212 has a shape in which a part of the edge is cut out along a plane parallel to the optical axis, and is adjacent to a flat notch surface generated by the notch. An illumination optical system 300 having its optical axis oriented parallel to the optical axis of the up optical system 210 is provided.

The pair of zoom optical systems 220 and 230 focus the subject light from the close-up optical system 210 at infinity at the positions of the field stops 270 and 271 respectively.

One zoom optical system 220 is shown in FIGS.
As shown in (1), the first and fourth lenses are configured in order from the close-up optical system 210 side, having first to fourth lens groups 221, 222, 223, and 224 having positive, negative, negative, and positive powers, respectively. The groups 221 and 224 are fixed, and zooming is performed by moving the second and third lens groups 222 and 223 in the optical axis direction. The magnification is changed mainly by moving the second lens group 222, and the focal position is kept constant by moving the third lens group 223.

The other zoom optical system 230 has the same configuration as the above-described zoom optical system 220, and includes first to fourth lens groups 231, 232, 233, and 234. These zoom optical systems 220 and 230 are linked by a drive mechanism (not shown), and can simultaneously change the photographing magnification of the left and right images.

Optical axes Ax of zoom optical systems 220 and 230
2, Ax3 is the optical axis Ax1 of the close-up optical system 210.
And the zoom optical systems 220 and 23
The plane including the optical axes Ax2 and Ax3 of 0 is parallel to the plane and includes the optical axis of the close-up optical system 210.
It is separated by Δ on the opposite side of the D cut portion.

The diameter of the close-up optical system 210 is set to be larger than the diameter of a circle containing the maximum effective diameter of the zoom optical systems 220 and 230 and the maximum effective diameter of the illumination optical system 300. As described above, the zoom optical systems 220 and 2
The 30 optical axes Ax2 and Ax3 are close-up optical systems 210.
By setting the optical axis Ax1 at a position farther from the D-cut portion than the optical axis Ax1, the illumination optical system 300 can also be accommodated within the diameter occupied by the close-up optical system 210 , and the whole can be made compact.

The field stops 270 and 271 are arranged at the positions of the primary images formed by the zoom optical systems 220 and 230. As shown in FIG. 6, the field stops 270 and 271 have a circular outer shape, and have semicircular openings on the inner side in the left-right direction. Each of the field stops 270 and 271 is arranged such that the straight edge of the opening coincides with the direction corresponding to the boundary between the left and right images on the CCD 116, and transmits only light beams inside the boundary.

As described above, in the microscope according to the embodiment, since the left and right secondary images are formed in adjacent regions on the single CCD 116, the boundary between the left and right images on the CCD 116 is clarified so that the images overlap. Need to be prevented. For this reason, the field stops 270 and 271 are arranged at the position of the primary image. By making the straight edge of the semicircular aperture function as a so-called knife edge and transmitting only the light beam inside the edge, the boundary between the left and right images on the CCD 116 can be clarified.

The primary images formed on the field stops 270 and 271 are re-imaged by the relay optical systems 240 and 250 to become secondary images, and the primary image and the secondary image are inverted vertically and horizontally. . Therefore, the knife edge that defines the outside in the left-right direction at the position of the primary image defines the inside in the left-right direction at the position of the secondary image, that is, the boundary between the left and right images.

The relay optical systems 240 and 250 have the function of re-imaging the primary image formed by the zoom optical systems 220 and 230 as described above, and each is constituted by three positive lens groups.

As shown in FIGS. 6 and 7, one relay optical system 240 has a first lens group 241 composed of a single positive meniscus lens, and a second lens group 242 having a positive power as a whole. And a third lens group 243 composed of a single biconvex lens. The first lens group 241 and the second lens group 242 have the object-side focal point as a whole fixed at the image forming plane of the primary image by the zoom optical system 220 (the same plane as the field stop 271). Further, the third lens group 243 is the second lens group 2
The parallel light emitted from 42 is converged on the imaging surface of CCD 116. A pentaprism 272 for deflecting the optical path at right angles is disposed between the first lens group 241 and the second lens group 242, and a light amount adjustment is provided between the second lens group 242 and the third lens group 243. Brightness stop 244 is provided.

The other relay optical system 250 has the same configuration as the above-mentioned relay optical system 240, and includes first, second, and third lens groups 251, 252, and 253. A pentaprism 273 is disposed between the second lens group 252 and the lens group 252, and a brightness stop 254 is provided between the second lens group 252 and the third lens group 253.

The divergent light that has passed through the field stops 270 and 271 is again converted into substantially parallel light by the first lens groups 241 and 251 and the second lens groups 242 and 252 of the relay optical system. After passing through, the image is formed again by the third lens groups 243 and 253 to form a secondary image.

By disposing the pentaprisms 272 and 273 in the relay optical systems 240 and 250, the photographing optical system 20 along the optical axis direction of the close-up optical system 210 is provided.
0 can be shortened.

The relay optical systems 240 and 250 have their second lenses 242 and 252 and their third lenses 243 and 25.
3 is adjustable in the optical axis direction and in the direction perpendicular to the optical axis. These second and third lens groups 242, 252, 24
3, 253 in the direction of the optical axis to move the first lens group 24
1, 251 and the second lens groups 242, 252, the relay optical systems 240, 2
The magnification (image height of the secondary image) of the entire 50 can be adjusted. Further, by moving only the third lens groups 243 and 253 in the optical axis direction, the back focus of the relay optical system is changed, and the focus of the CCD 116 can be adjusted. Further, the second lens groups 242, 252 and the third
By adjusting the lens groups 243 and 253 integrally in a direction perpendicular to the optical axis, the position of the secondary image in a plane orthogonal to the optical axis can be adjusted. For such adjustment, the second lens group 242 and 252 and the third lens group 24
3, 253 are held by an integral outer lens barrel (second lens frame 32 and third lens mounting frame 34), and the third lens group 24
3, 253 is further held in an inner barrel (third lens frame 35) movable in the optical axis direction with respect to this barrel.

As described above, since the second lens group 242, 252 and the third lens group 243, 253 move for adjustment, the pentaprism 272,
The provision of 273 complicates the adjustment mechanism. Therefore, the pentaprisms 272 and 273 are provided with the field stops 270 and 271.
And the second lens group 242, 252. Further, since the degree of divergence of the subject light is weakened by the first lens groups 241 and 251, the pentaprisms 272 and 273 are connected to the first lens groups 241 and 25 as in the embodiment in order to reduce the effective diameter of the pentaprism.
It is desirable to provide between the first lens group 242 and the second lens group 252.

A convergence shifting prism 260 disposed between the relay optical systems 240 and 250 and the CCD camera 102
Has a function of narrowing the left and right intervals of subject light from the respective relay optical systems 240 and 250. In order to obtain a stereoscopic effect by stereoscopic vision, left and right zoom optical systems 220 and 23 are used.
0, a predetermined base line length is required between the relay optical systems 240 and 250. On the other hand, in order to form a secondary image in an adjacent area on the CCD 116, the distance between the optical axes needs to be smaller than the base length. Therefore, the congestion approaching prism 260
By shifting the optical axis of the relay optical system inward, the same CCD can be maintained while maintaining a predetermined base line length.
It allows for upward imaging.

The converging prism 260 is shown in FIGS.
As shown in FIG. 5, the optical axis shift prisms 261 and 262 of a pentagonal prism are arranged to face each other with a gap of about 0.1 mm.

As shown in FIG. 9, the optical axis shift prisms 261 and 262 have an incident end face and an exit end face parallel to each other, and have first and second reflecting faces parallel to each other inside and outside. ing. When viewed in a plane perpendicular to the entrance and exit end faces and the reflection surface, these optical axis shift prisms 261 and 262 form one of the acute apex angles of the parallelogram as a line perpendicular to the exit end face. It is a pentagonal shape formed by cutting out with.

The subject light from the relay optical systems 240 and 250 enters from the entrance end faces of the optical axis shift prisms 261 and 262, is reflected by the outer reflecting surface, is directed inward in the left and right direction, and is directed to the inner reflecting surface. Is reflected again in the same optical axis direction as at the time of incidence, exits from the exit end face, and is
Incident on. As a result, the left and right object lights are narrowed only in the left and right intervals without changing their traveling directions, and the same CCD 1
16 to form a secondary image. <Illumination Mechanism> Next, the configuration of an illumination mechanism including the above-described light guide fiber bundle 105 and illumination optical system 300 will be described. FIG. 10 shows a close-up optical system 210.
FIG. 11 is a longitudinal sectional view of the stereoscopic microscope 101, the light guide fiber bundle 105, and the counterweight 104 along a plane including the optical axis Ax1 of the illumination optical system 300 and the optical axis Ax4 of the illumination optical system 300. FIG.
5 is a top view of the binocular microscope 101 with the counterweight 104 and the counterweight 104 removed. FIG.

As shown in FIGS. 5 and 10 described above, the distal end of the light guide fiber bundle 105 is inserted from the base end side of a fiber guide 122 composed of an aluminum cylinder (pipe). 122 is fixed near the tip opening. Therefore, the illumination light transmitted from the light source device 106 by the light guide fiber bundle 105
It is emitted while diverging from the front end opening at a predetermined opening angle. The vicinity of the base end (upper end in FIG. 10) of the fiber guide 122 is formed as a knob 122a having a diameter slightly larger than the outer diameter of the intermediate portion. This knob 12
An outer flange 122b is further formed to protrude from the outer edge of the end of 2a. Further, the distal end of the fiber guide 122 has a distal end 12 slightly smaller in diameter than the outer diameter of the intermediate portion.
2c.

On the other hand, as shown in FIGS. 5, 10 and 11, a concave part 101a having a circular opening is formed in the center of the casing upper plate 1 which forms a part of the casing of the binocular microscope 101. Have been. The depth of the recess 101a is the same as the axial length of the knob 122a of the fiber guide 122, and the center of the recess 101a has an insertion port slightly larger than the outer diameter of the intermediate portion of the fiber guide 122. 1a
Is open.

The insertion slot 1a has a fiber guide 12
A fiber guide insertion portion 123 made of a thick cylindrical member having an inner diameter substantially equal to the outer diameter of the second pinch portion 122a is coaxially fixed. This fiber guide insertion portion 123
A click on the outer surface of the fiber guide 122 is formed on the inner surface thereof, and a chuck for fixing the fiber guide 122 is provided, and functions as a fixing member for fixing the fiber guide 122. The length of the fiber guide insertion portion 123 in the axial direction is:
The length is about half the length of the knob 122 a of the fiber guide 122. Further, an inner flange 123a having an inner diameter substantially equal to the outer diameter of the intermediate portion of the fiber guide 122 is formed to protrude in the axial direction from the inner edge of the lower end opening of the fiber guide insertion portion 123. This inner flange 123
"a" is coaxially inserted into the insertion opening 1a of the housing upper plate 1. Therefore, when the fiber guide 122 is inserted into the fiber guide insertion portion 123 and pushed in as far as it will go, the knob 122 a of the fiber guide 122 comes into contact with the inner flange 123 a of the fiber guide insertion portion 123, so that the fiber guide 122 Fiber guide insertion part 12
3 is determined. In this state, the outer end surface of the outer flange 122b of the fiber guide 122 is flush with the outer surface of the housing upper plate 1. Therefore, the light guide fiber bundle 105
Is curved from a position on the same plane as the outer surface of the housing upper plate 1, so that the minimum bending radius α of the light guide fiber bundle 105 itself is located above the outer surface of the housing upper plate 1.
Only the space of the same height as the distance of the
It suffices if the light guide fiber bundle 105 is secured as a moving space.

In this manner, the fiber guide insertion section 12
3. The tip 122c of the fiber guide 122 fixed to 3
Penetrates coaxially with the upper end of the lens barrel 2 that holds the illumination optical system 300 described above. This illumination optical system 300
Has a function of projecting the illumination light emitted from the tip of the fiber guide 122 onto the observation target existing on the optical axis Ax1 of the close-up optical system 120, and diverging from the tip of the fiber guide 122. The illumination lens 310 adjusts the degree of divergence of the emitted illumination light, and the wedge prism 320 matches the illumination range of the illumination light with the imaging range of the imaging optical system 200. Since the optical axis Ax4 of the illumination lens 310 is offset parallel to the optical axis Ax1 of the close-up optical system 210 by a predetermined amount as shown in FIG. 7, the center of the illumination range and the center of the photographing range match in this state. Otherwise, the amount of illumination light is wasted. By providing the wedge prism 320, the above mismatch can be resolved, and the illumination light amount can be used effectively.

In order to hold the illumination optical system 300, a fiber fixed to the fiber guide insertion part 123 is provided at the upper end of the lens barrel 2 fixed coaxially with the fiber insertion part 123 in the housing of the binocular microscope 101. Guide 122
Is inserted coaxially. In order to hold the distal end of the fiber guide 122 inserted in this manner, an inner surface near the upper end of the lens barrel 2 is formed as a receiving portion 2a having an inner diameter substantially equal to the outer diameter of the fiber guide 122. The upper end surface of the lens barrel 2 in which the receiving portion 2a is formed is formed in a mortar shape to guide the tip of the fiber guide 122 inserted through the fiber guide inserting portion 123 into the opening of the receiving portion 2a. I have. The position measuring device 13 is provided on the upper surface of the housing upper plate 1 of the binocular microscope 101.
Counter weight 10 for optional weights such as
4 is attached. There are various types of counterweights 104 having various weights, such as options such as the position measuring device 13 and the CCD high-vision camera 102.
The center of gravity of the binocular microscope 101 including the
1 is appropriately selected and fixed to the upper surface of the housing upper plate 1 of the binocular microscope 101 so as to approach the vicinity of a mount for attaching the first arm 1 to the free arm 100 a of the first stand 100. As shown in the perspective view of FIG. 12, each counter weight 104 has a plate-like shape having the same planar shape as the binocular microscope 101, and is attached with its side surface flush with the side surface of the binocular microscope 101. Can be At the center of each counterweight 104, escape holes 104a overlapping with the recess 10 1 a in a state of being fixed to the upper surface of the housing top plate 1 of the binocular microscope 101 is opened. The fiber guide 122 of the light guide fiber bundle 105 described above.
Are inserted into the fiber guide insertion portion 123 through the relief holes 104a of the respective counterweights 104 fixed to the upper surface of the housing upper plate 1 of the binocular microscope 101. At this time, since the inner diameter of the concave portion 100a of the housing upper plate 1 and the escape hole 104a of each counter weight 104 is sufficiently large,
The light guide fiber bundle 105 does not interfere with each counter weight 104 and the fiber guide 1
The fiber guide 122 can be easily attached and detached by pinching the pinch portion 122a of the fiber. (Operation of Embodiment) According to the binocular microscope 101 according to the above-described embodiment, as described above, the moving space of the light guide fiber bundle 105 has a height α from the upper surface of the housing upper plate 1 (light guide fiber bundle). 105
Only the space of (the minimum radius of curvature) + d (the outer diameter of the light guide fiber bundle 105) is sufficient. Therefore, it is sufficient that the options (not shown) mounted above the binocular microscope 101 be separated from the upper surface of the housing upper plate 1 by a distance α + d . In addition, the binocular microscope 101 can bring the upper surface of the housing upper plate 1 closer to a distance α + d with respect to other devices and the like in the surgery support system. Accordingly, the operation of the binocular microscope 101 is
Better than those without 1a. Therefore, an accident such as a collision between system components due to poor handling is prevented, and the photographing direction of the binocular microscope 101 is not restricted.

[0053]

As described above, according to the microscope of the present invention, it is possible to reduce the height of the space which must be secured as a moving space for the light guide fiber bundle above the upper surface of the housing of the microscope. it can. This improves the handling of the binoculars.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the overall configuration of a surgery support system incorporating a video stereo microscope according to a first embodiment of the present invention;

FIG. 2 is an optical configuration diagram schematically showing an optical configuration in a video stereo microscope.

FIG. 3 is an optical configuration diagram schematically showing an optical configuration of a video stereoscopic viewer.

FIG. 4 is a plan view of an LCD panel.

FIG. 5 is an external perspective view of a stereo microscope.

FIG. 6 is a perspective view showing the overall configuration of a microscope optical system.

FIG. 7 is a side view showing the overall configuration of the microscope optical system.

FIG. 8 is a front view showing the entire configuration of the microscope optical system.

FIG. 9 is a plan view showing the overall configuration of a microscope optical system.

FIG. 10 is a schematic longitudinal sectional view of a video stereo microscope.

FIG. 11 is a top view of a video stereo microscope.

FIG. 12 is a perspective view of a counterweight.

FIG. 13 is a schematic sectional view of a microscope having no concave portion on the upper surface.

[Explanation of symbols]

 Reference Signs List 1 housing upper plate 2 lens barrel 101 binocular telescope 101a recess 105 light guide fiber bundle 122 fiber guide 123 fiber guide insertion part 200 shooting optical system 300 illumination optical system

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 5/225 H04N 5/225 D 13/02 13/02 // H04N 7/18 7/18 B

Claims (6)

[Claims] An objective optical system for shaping an image of an observation object;
A microscope comprising: an illumination optical system for irradiating the observation target with illumination light; and a housing containing the objective optical system and the illumination optical system. An insertion opening through which a light guide for supplying illumination light to the system is inserted is opened coaxially with the optical axis of the illumination optical system, and the outer surface of the housing around the insertion opening is smaller than other portions. A microscope formed as a concave recess. 2. The microscope according to claim 1, wherein the light guide is a light guide fiber bundle having a pipe covered on a tip thereof, and the pipe is inserted into the insertion port. 3. A fixing member for fixing the pipe is attached to the insertion opening.
Microscope as described. 4. The microscope according to claim 3, wherein the fixing member positions and fixes the pipe at a position where a base end of the pipe does not protrude from the recess on the outer surface of the housing. 5. The fixing member according to claim 4, wherein the pipe is positioned and fixed at a position where a base end thereof is on the same plane as the periphery of the concave portion on the outer surface of the housing. Microscope. 6. The illumination optical system is held in a lens barrel, and a tip of the pipe fixed by the fixing member is:
The microscope according to claim 3, wherein the microscope is inserted coaxially with the illumination optical system at an end of the lens barrel.